Core for rolls of paper



H. PARKER.

CORE FOR ROLLS OF PAPER.

APPLICATION FILED DEC.23. I919.

Patented Nov. 15, 19211.,

LSQKMERO avwew toz earnnr EOWARD PARKER, OF BERLIN, IQ'EVJ HAMIPSHIRE, ASSIGNOR TO BROWN COMPANY,

OF BERLIN, NEW HAIVIPSHIRE, A CORPORATION OF NEW HAMPSHIRE.

CORE FOR ROLLS OF PAPER.

Specification of Letters Patent.

Patented Nov. 115, 11921.

Application filed December 23, 1919. Serial No. 346,846.

To all whom it may concern Be it known that l, HOWARD PARKER, a citizen of the United States, and a resident of Berlin, county of Coos, State of New Hampshire, have invented certain new and useful improvements in Cores for Rolls of Paper, of which the following is a specification.

This invention relates to tubular cores formed of paper pulp stock upon which material such as paper can be conveniently wound up into rolls and consists in a reinforcing bushing for such cores and in the method of constructing and applying the same.

The object of the present invention is to reduce the cost of manufacture and provide a strong reinforcing bushing securely held in position at the points of greatest wear, 2'. e., the ends of the cores.

Referring to the drawing Figure l 'is a perspective 'view of an end portion of a complete core.

Fi 2 is a shaped blank from which the bushing is formed.

Figs. 3 and 4 are perspective views of the bushing in the process of manufacture.

ig. 5 is a sectional view of one end of the core with the bushing positioned therein but not yet secured in place.

1F ig'.- =6 is a partial end view showing the clencfiing fingers bent into locking engagement with the end of the paper core, and

Fig. 7 is a central sectional view of one end of the coreshowing the reinforcement secured in place.

Referring to the drawing in detail, a. denotes the core proper; l) is a notch in the end of the core to receive a driving dog or spline for the purpose of turning the core either in the winding or unwinding operation; and 0 denotes, generally, the reinforcing bushing fitted to both ends of the coreto strengthen the same so that they are enabled to withstand the strain and wear to which they are subjected when winding thereon or unwinding therefrom a roll of paper, and also so that they cannot be broken down by rough handling, as, for instance, in case a pry bar is inserted in order to conveniently move a roll of paper wound on the core.

The preferred method of manufacturing and applying the bushing c is carried out by the following steps; a rectangular blank 10 of the correct length and width is stamped out and then cut to the shapeshown in Fig. i

2 so as to provide at each end of the blank a finger 11; in the completed article these fingers form the clenchers hereinafter referred to; the blank 10 is bent into the form of a cylinder with the ends overlapping and these overlapping ends, except the fingers 11, are welded together, as at 12, Fig. 3, so that the bushing, then being in the form of a solid ring, is sufficiently strong to resist all radial strains. For convenience in positioning the bushing in the cores, the inner diameters of which may vary somewhat, the inner end of the bushing is reduced in diameter by bending the same inwardly, in the present instance it being crimped or corrugated for this purpose, as shown in Fig. 4, so as to allow it to be easily entered into the core; the outer end of the bushing is flanged over as at 14: to protect the ends of the cores; the fingers 11 are bent outwardly and then over at their outer ends as shown in F ig. 4. The bushing is inserted into one end of the core with the fingers 11 positioned within the notch b and then the inner end of the bushing is expanded and its edge rolled or spun outwardly to embed it in the core wall, as shown in Fig. 7, so as to eliminate an abrupt shoulder and thus remove the danger of a shaft or bar when inserted through the core striking the inner end of the bushing and driving the latter from position. The fingers are then folded over the edge of the notch of the core and clenched into the core wall to provide metallic wearing surfaces for the dog and assist in holding the bushing in place. The ends of the blank are preferably lapped the full length of the fingers so as to permit of a strong weld and to give the clenchers formed from these fingers suificient length that they will grip or bite into the core at a distance beyond the edges of the notch b.

It will be seen that the bushing is of substantial length and the internal diameter of the bushing is less than that of the core so that the bushing provides a relatively large metallic bearing surface for a spindle inserted through the core; also the inner edge of the bushing is embedded into the core wall without appreciably weakening the same.

in accordance with the provision of the patent statutes, 1 have described the principle of operation of my invention together with the apparatus which I now consider to represent the best embodiment thereof but I desire to have it understood that the apparatus shown is only illustrative and that the invention can be carried out by other means.

I claim as my invention 1. A bushing for tubular cores having a notch at one end and clenching fingers springing from the sides ofthe notch, said fingers being in length greater than one-half the width of the notch.

2. A metallic bushing for tubular cores formed from a sheet metal blank and having a lapped weld, a notch in the bushing at one end of the lapped weld, and clenching fingers springing from the sides of the notch.

3. A bushing for tubular cores formed from a sheet metal blank and having a lapped weld, a notch in the bushing at one end of the lapped weld, and clenching fingers springing from the sides of the notch, said fingers being in length greater than onehalf the width of the notch.

4. A tubular core and a cylindrical bushing fitted in the end of-said core,.said bushing being of substantial length and of less internal diameter than that of the core, thus providing a substantial metallic bearing surface and the inner edge of the bushing being expanded and embedded into the wall of the "embedded into the wall of said core.

6. The method herein described which consists in shaping a blank to form fingers at opposite ends and adjacent one edge thereof, bending the blank into cylindrical form until the ends thereof overlap, securing together the overlapping ends, and bending the fingers to form clenchers with a notch therebetween.

7 The method herein described which consists in shaping a blank to provide fingers at opposite ends and adjacent one edge thereof, bending the blank into cylindrical form until the ends thereof including the fingers overlap, securing together the overlapping ends, excepting the fingers, and bending the fingers to-forin clenchers with the notch therebetween.

8. The method herein described which consists in shaping a. blank to provide fingers at opposite ends and adjacent one edge thereof, bending I until the ends thereof including the fingers overlap, welding the overlapping ends, excepting the fingers, bending the fingers to form clenchers with the notch therebetween,

the blank into cylindrical form then inserting the bushing into a tubular core having a notch with which the notch of the bushing coincides and then bending the fingers over the edges of the notch in the core and clenching them into the core wall.

9. The method ,herein described which consists in. shaping a blank to provide a finger at each end and adjacent one edge thereof, bending the blank into cylindrical formuntil the ends thereof overlap, welding the overlapping ends of'the blank excepting the fingers, reducing the inner end of the bushing, bending out the fingers to form clenchers with a notch therebetween, inserting the bushing into a tubular core having a over the edges of the notch f the core and clenching them into the core wall, expanding the inner end of the bushing and rolling the inner edge of the same outwardly to embed it in the core wall.

HOWARD PAR-KER. Witnesses:

E. A. BAILEY, J. A. SULLIVAN.

notch with which ,the notch in the bushing is coincident, bending the clenchers;- 

